Cocoa Spice, a kind-hearted Saintess with fragile beauty and powerful holy magic ......This is only a front. The true nature of the saintly woman is that she is a very careful person who is working hard to save money for her retirement. She was originally a street child, and she was determined to make a living on her own, without relying on others. That pride has carried on now that she has become the Saintess. The prestige of the Pope?　A love call from a prince?　The clutches of a gangster? Whatever the obstacle, if I don't like it, I will strike in every possible way!

Rachel, the Duke's Daughter, was accused of crimes that she had never even heard of by the Crown Prince Elliot and imprisoned in the palace dungeon. Was this a plot hatched by one of her rivals or a conspiracy formed by political foes of her family…!? Rachel, however, only had one thing on her mind… "Hooray for prison! An endless lazy slow life! No more of that wretched royal education or those suffocating servants for me, it's time for a vacation!" Rachel, who was ready and rearing to go, will enjoy her leisure filled days harassing the Prince from her prison cell! Her liberating and pleasant (slow) life in prison is about to begin.